Liquid cooling structure for energy storage battery pack

Abstract

The utility model relates to the technical field of batteries, in particular to a liquid cooling structure for an energy storage battery pack, which comprises an outer protective shell, and a battery cell module, a liquid pump and a liquid box which are positioned in the outer protective shell, first heat-conducting fins are fixedly connected to the top and the bottom of the battery cell module, a condensation pipe is arranged in an inner cavity of each first heat-conducting fin, and a fixing plate is fixedly connected to the opposite side of each first heat-conducting fin; the liquid box is fixedly arranged at the bottom of the fixing plate located on the lower portion, the liquid inlet end of the liquid pump is communicated with the liquid box, the liquid outlet end of the liquid pump is communicated with the liquid inlet ends of the two condensation pipes respectively, the liquid outlet ends of the two condensation pipes are both communicated with the liquid box, and each condensation pipe is provided with at least two liquid inlet and outlet pipelines. The liquid-cooled battery pack has the advantage of carrying out liquid-cooled heat dissipation on the battery pack.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a liquid cooling structure for energy storage battery pack. BACKGROUND

[0002] Liquid cooling technology is a kind of efficient thermal management mode in energy storage battery pack, can effectively solve the heat problem generated in the process of battery charging and discharging, guarantees the operation of battery in the safe temperature range, along with the continuous development of technology, liquid cooling system will play more and more important role in electric vehicle, energy storage system and other high-performance battery applications, and it is expected to make greater breakthrough in system integration, coolant selection and intelligent management etc.

[0003] At present, most of the flow channel design has problems, resulting in very uneven temperature distribution, specifically, in the prior art, since only one liquid inlet and one liquid outlet are arranged, the flow channel is long, the temperature of coolant is lower at the liquid inlet side, and the temperature of coolant is higher at the liquid outlet side, this temperature difference distribution makes the temperature of the first battery cell region at the liquid inlet side too low, and the temperature of the first battery cell region at the liquid outlet side too high, due to the imbalance of temperature distribution, the use performance and service life of battery cell are affected, and the temperature difference is large, which not only affects the charging and discharging efficiency of battery, but also accelerates the aging of battery cell and reduces the overall service life of battery. UTILITY MODEL CONTENTS

[0004] In view of the above problems, the utility model discloses a liquid cooling structure for energy storage battery pack to solve the problem that the temperature difference distribution of coolant at the liquid inlet and the liquid outlet is large in the prior art, which affects the use performance and service life of battery cell.

[0005] The utility model discloses a liquid cooling structure for energy storage battery pack, wherein an outer protective shell, a battery cell module, a liquid pump and a liquid tank located in the outer protective shell are arranged in the outer protective shell.

[0006] The top and the bottom of the battery cell module are fixedly connected with first heat-conducting sheets, and the inner cavity of each first heat-conducting sheet is provided with a condenser pipe, and the side opposite to each first heat-conducting sheet is fixedly connected with a fixed plate.

[0007] The liquid tank is fixedly arranged at the bottom of the fixed plate located below, the liquid inlet end of the liquid pump is communicated with the liquid tank, the liquid outlet end of the liquid pump is respectively communicated with the liquid inlet end of two condenser pipes, and the liquid outlet end of the two condenser pipes is respectively communicated with the liquid tank.

[0008] Each condenser pipe is provided with at least two liquid inlet and outlet pipelines.

[0009] In some embodiments, the edges of the battery cell module, the first heat-conducting sheet and the fixing plate are aligned up and down, one side of the liquid tank protrudes outside the fixing plate, and the liquid pump is arranged on the top of the protruding side of the liquid tank.

[0010] In some embodiments, the battery cell module, the two first heat-conducting sheets and one side of the two fixing plates are fixedly connected with a fixed baffle, and the bottom of the fixed baffle is fixed on the top of the protruding side of the liquid tank.

[0011] The liquid pump is arranged outside the fixed baffle, the liquid outlet end of the liquid pump and the liquid inlet ends of the two condensing pipes are connected in communication through a liquid inlet pipe, and the liquid inlet end pipe of the liquid inlet pipe penetrates through the fixed baffle and is connected in communication with the liquid outlet end of the liquid pump.

[0012] In some embodiments, the two condensing pipes are each provided with two liquid inlet ends and one liquid outlet end, and the two liquid inlet ends of each condensing pipe are respectively located on the two sides of the liquid outlet end of the condensing pipe.

[0013] The two liquid inlet ends on the same side of the two condensing pipes are connected through a liquid inlet pipe, the two liquid inlet pipes are connected in communication through a liquid inlet communication pipe, the liquid inlet end pipe of the liquid inlet pipe arranged adjacent to the liquid pump penetrates through the fixed baffle and is connected in communication with the liquid outlet end of the liquid pump, the liquid outlet ends of the two condensing pipes are connected in communication through a liquid outlet pipe, and the liquid outlet end pipe of the liquid outlet pipe penetrates through the fixed baffle and is connected in communication with the liquid tank.

[0014] In some embodiments, the liquid outlet end of each liquid inlet pipe is connected in communication with the liquid inlet ends of the two condensing pipes through a flange, and the two liquid inlet ends of the liquid outlet pipe are connected with the liquid outlet ends of the two condensing pipes through a flange.

[0015] In some embodiments, a first fixing block is connected to the outside of the fixed baffle adjacent to the liquid inlet pipe, and a first motor is fixedly connected in the inner cavity of the first fixing block, the output end of the first motor is fixedly connected with an electric control valve, and the electric control valve is arranged on the liquid inlet pipe.

[0016] In some embodiments, the electric control valve is an electric butterfly valve.

[0017] In some embodiments, a plurality of heat dissipation holes are formed in the surface of the first fixing block.

[0018] In some embodiments, a plurality of clamping mechanisms for clamping the condensing pipes are arranged on the surface of the fixing plate.

[0019] The clamping mechanism comprises a second fixing block, a fixing rod and a clamping block, the second fixing block is connected to the fixing plate, the inner cavity of the second fixing block is fixedly connected with the fixing rod, the clamping block is rotatably connected to the fixing rod, the two side bottoms of the clamping block are fixedly connected with springs, the other end of the spring is fixedly connected to the top of the second fixing block, and the condenser pipe is arranged in the inner cavity of the clamping block.

[0020] In some embodiments, the bottom of the liquid tank is fixedly connected with two second heat-conducting sheets, the surfaces of the two second heat-conducting sheets are fixedly connected with fans, the bottom of the liquid tank is fixedly connected with a second motor, and the output end of the second motor is electrically connected with the fans.

[0021] Compared with the prior art, the utility model has at least one of the following advantages or beneficial effects:

[0022] Firstly, the utility model has the advantages of liquid cooling heat dissipation for the battery pack, through the cooperation of the first heat-conducting sheet, the condenser pipe, the liquid tank, the liquid pump, the liquid inlet pipe, the liquid outlet pipe and the liquid inlet communication pipe, the heat generated in the battery cell can be effectively exchanged through the liquid cooling mode, the condenser pipe is designed in a short stroke structure and provided with two liquid inlet ends, so that the efficiency of the cooling liquid flow is improved and the liquid cooling effect is improved.

[0023] Secondly, through the cooperation of the first fixing block, the first motor and the electric butterfly valve, the electric butterfly valve can accurately adjust the flow and flow rate of the cooling liquid to realize dynamic adjustment according to the change of the battery cell temperature, avoid the influence of the performance of the battery cell due to overcooling or overheating, ensure that the battery cell works in the best temperature range and fully play its performance.

[0024] Thirdly, through the synergistic effect of the second heat-conducting sheet, the fan and the second motor, the circulation of the hot liquid in the liquid tank is optimized, the air cooling system effectively assists the liquid cooling system, helps to accelerate the heat dissipation of the hot liquid in the liquid tank and ensure the temperature control precision of the whole system, so that the double optimization of liquid cooling and air cooling is realized, the heat dissipation efficiency of the liquid in the liquid tank is improved, and the thermal management effect of the battery pack in the use process is improved. BRIEF DESCRIPTION OF DRAWINGS

[0025] The utility model and its features, shape and advantages will become more apparent by reading the following detailed description of the non-limiting embodiments with reference to the accompanying drawings. The same reference signs indicate the same parts throughout the drawings. The drawings can not be drawn to scale, the emphasis is on showing the main idea of the utility model.

[0026] Fig. 1 It is an external schematic view of the liquid cooling structure for the energy storage battery pack in the utility model embodiment.

[0027] Fig. 2 It is the inside schematic view of the liquid cooling structure for the energy storage battery pack in the embodiment of the utility model;

[0028] Fig. 3 It is the inside schematic view of the liquid cooling structure for the energy storage battery pack in the embodiment of the utility model removes the fixed plate and fixed baffle located above;

[0029] Fig. 4 It is the connection relation schematic view of the condenser pipe, liquid pump, liquid inlet pipe, liquid outlet pipe and liquid inlet communication pipe in the embodiment of the utility model;

[0030] Fig. 5 It is the connection relation schematic view of the second heat conduction sheet, fan and second motor in the embodiment of the utility model;

[0031] Fig. 6 It is the connection relation schematic view of the fixed plate, clamping mechanism and condenser pipe in the embodiment of the utility model;

[0032] Fig. 7 It is the structure schematic view of the clamping mechanism in the embodiment of the utility model;

[0033] In the drawing: 1 is outer protective shell, 2 is electric core module, 3 is first heat conduction sheet, 4 is condenser pipe, 5 is fixed plate, 6 is liquid tank, 7 is fixed baffle, 8 is liquid pump, 9 is liquid inlet pipe, 10 is first fixed block, 11 is first motor, 12 is electric butterfly valve, 13 is liquid outlet pipe, 14 is liquid inlet communication pipe, 15 is second fixed block, 16 is fixed rod, 17 is clamping block, 18 is spring, 19 is second heat conduction sheet, 20 is fan, 21 is second motor. Specific implementation

[0034] The utility model will be further explained in conjunction with the specific embodiment and the drawing, but not as the limitation of the utility model.

[0035] As Figs. 1-7The utility model discloses a liquid cooling structure for energy storage battery pack, and specifically the liquid cooling structure includes outer protective shell 1 and the electric core module 2, liquid pump 8 and liquid tank 6 in the electric core module 2 of being located in outer protective shell 1, the electric core module 2 fixedly connected in the inner chamber of outer protective shell 1, the top and bottom of electric core module 2 are all fixedly connected with first heat conduction sheet 3, and the inner chamber of two first heat conduction sheets 3 is all through the setting of condenser pipe 4, and the side opposite of two first heat conduction sheets 3 is all fixedly connected with fixed plate 5, and liquid tank 6 is fixedly arranged at the bottom of fixed plate 5 below, and the periphery edge of electric core module 2, first heat conduction sheet 3 and fixed plate 5 is all up and down alignment, and one side of liquid tank 6 protrudes from the outside of fixed plate 5, and the top of liquid tank 6 protruding side is set with liquid pump 8. The side of electric core module 2, first heat conduction sheet 3 and fixed plate 5 is commonly fixedly connected with fixed baffle 7, and the bottom of fixed baffle 7 is fixed at the top of liquid tank 6 protruding side, and the outside of fixed baffle 7 is set with liquid pump, and the liquid outlet end of liquid pump 8 is communicated with the liquid inlet end of two condenser pipes 4 through liquid inlet pipe 9, and the liquid inlet end of liquid pump 8 is communicated with liquid tank 6, and the liquid inlet end pipe of liquid inlet pipe 9 is communicated with the liquid outlet end of liquid pump 8 through fixed baffle 7, and every condenser pipe 4 is provided with two liquid inlet and outlet pipes to shorten the cooling liquid stroke.

[0036] Specifically, two condenser pipes 4 are provided with two liquid inlet ends and one liquid outlet end, and the two liquid inlet ends of each condenser pipe 4 are located on the two sides of the liquid outlet end of the condenser pipe 4 respectively; the two liquid inlet ends on the same side of the two condenser pipes 4 are connected through a liquid inlet pipe 9, and the liquid outlet end of each liquid inlet pipe 9 is communicated with the liquid inlet end of the two condenser pipes 4 through a flange respectively, the two liquid inlet pipes 9 are communicated through a liquid inlet communication pipe 14, that is, the surface of the two liquid inlet pipes 9 is commonly communicated with the liquid inlet communication pipe 14, the liquid inlet communication pipe 14 is arranged in the inner chamber of the fixed baffle 7, and the liquid inlet end pipe of the liquid inlet pipe 9 arranged near the liquid pump 8 is communicated with the liquid outlet end of the liquid pump 8 through the fixed baffle 7, and the liquid outlet ends of the two condenser pipes 4 are communicated through a liquid outlet pipe 13 (that is, the liquid outlet ends of the two condenser pipes 4 are commonly communicated with the liquid outlet pipe 13), and the two liquid inlet ends of the liquid outlet pipe 13 are connected with the liquid outlet ends of the two condenser pipes 4 through a flange respectively, and the liquid outlet end pipe of the liquid outlet pipe 13 is communicated with the inner chamber of the liquid tank 6 through the fixed baffle 7.

[0037] Specifically, the surface of the above-mentioned fixed plate 5 is provided with a plurality of clamping mechanisms for clamping the condenser pipe 4;

[0038] The clamping mechanism comprises a second fixed block 15, a fixed rod 16 and a clamping block 17, the surface of the fixed plate 5 is fixedly connected with the second fixed block 15, the inner cavity of the second fixed block 15 is fixedly connected with the fixed rod 16, the surface of the fixed rod 16 is rotatably connected with the clamping block 17, the bottom of both ends of the clamping block 17 is fixedly connected with the spring 18, the other end of the spring 18 is fixedly connected to the top of the second fixed block 15, and the inner cavity of the clamping block 17 is connected with the condenser tube 4, that is, the condenser tube 4 is arranged in the inner cavity of the clamping block 17.

[0039] In the embodiment: through the cooperation of the second fixed block 15, the fixed rod 16, the clamping block 17 and the spring 18, the condenser tube 4 can be effectively and stably clamped, so as to prevent the condenser tube from shaking or shifting during the working process of the battery pack, enhance the structural stability of the liquid cooling system, reduce the loosening or damage of the pipeline caused by vibration or external force, and also improve the safety and reliability of the battery pack as a whole.

[0040] Specifically, the outer side of the fixed baffle 7 is fixedly connected with a first fixed block 10 near one of the liquid inlet pipes 9, and the inner cavity of the first fixed block 10 is fixedly connected with a first motor 11, the output end of the first motor 11 is fixedly connected with an electric butterfly valve 12, and the electric butterfly valve 12 is arranged on the liquid inlet end pipe of the liquid inlet pipe 9.

[0041] In the embodiment: through the cooperation of the first motor 11 and the electric butterfly valve 12, the electric butterfly valve 12 is used as an electric valve, which can accurately control the flow and speed of the cooling liquid flow, and according to the real-time temperature change of the battery cell module 2, the system can automatically adjust the liquid flow to ensure that the battery pack is always in the best working temperature range. Specifically, the bottom of the liquid tank 6 is fixedly connected with two second heat-conducting fins 19, and the surface of each second heat-conducting fin 19 is fixedly connected with a fan 20, the bottom of the liquid tank 6 is fixedly connected with a second motor 21, and the output end of the second motor 21 is electrically connected to the surface of the fan 20.

[0042] In the embodiment: through the cooperation of the second heat-conducting fin 19 and the fan 20, the air cooling effect is further enhanced, when the hot liquid circulating in the liquid cooling system flows through the second heat-conducting fin 19, the fan 20 will provide strong airflow to cool the heat-conducting fin, thereby accelerating the cooling process of the hot liquid and improving the working performance and service life of the battery pack.

[0043] Specifically, a plurality of heat dissipation holes are formed in the surface of the first fixed block 10.

[0044] In this embodiment: through the design and reasonable layout of the heat dissipation hole, the heat exchange in the first motor 11 can be effectively realized, and the performance of the first motor 11 will not be reduced or damaged due to overheating when the first motor 11 is in high load or long time operation. The setting of the heat dissipation hole enables the air to circulate and take away the heat generated in the first motor 11, and at the same time improves the heat dissipation efficiency of the external cooling system, improves the safety, reliability and economy of the whole equipment.

[0045] The working principle and use process of the utility model: the user places the outer protective shell 1 in the designated position, starts the liquid pump 8 to work, the liquid pump 8 extracts the cooling liquid from the liquid tank 6, the cooling liquid enters the system through the liquid inlet pipe 9, and is connected with the first motor 11 through the liquid inlet pipe 9, then the cooling liquid enters the condenser pipe 4 through the liquid inlet communication pipe 14, and the battery module 2 is liquid-cooled through the two sides of the condenser pipe, the top of the battery module 2 is fixedly connected with the first heat conduction sheet 3, the condenser pipe 4 penetrates the surface of the first heat conduction sheet 3, and heat exchange is realized through the cooperation of the condenser pipe and the heat conduction sheet, so that the heat generated by the battery module 2 is quickly transferred, after heat exchange, the hot liquid flows out through the liquid outlet pipe 13, and finally returns to the liquid tank 6 for circulation, two second heat conduction sheets 19 are fixed at the bottom of the liquid tank 6, and a fan 20 is connected to the surface of the second heat conduction sheet 19, the second motor 21 at the bottom of the liquid tank 6 is started to drive the fan 20 to work, and the heat exchange between the second heat conduction sheet 19 and the hot liquid in the liquid tank 6 is further promoted through the air cooling effect, finally the hot liquid is cooled to the cooling liquid state, ready for use again, a first fixed block 10 is fixedly connected to one side of the fixed baffle 7, the inner cavity of the fixed block contains the first motor 11, the first motor 11 can drive the electric butterfly valve 12 to adjust, and the liquid flow is automatically adjusted according to the temperature change of the battery module 2, so that the system can reach the best cooling effect in the shortest time, and the surface of the first fixed block 10 is provided with heat dissipation holes, through the heat dissipation holes, the first motor 11 can exchange heat with the external environment, effectively avoiding overheating and ensuring normal operation, in addition, the fixed plate 5 is fixedly connected to the opposite side of the two first heat conduction sheets 3, the surface of the fixed plate 5 is provided with a second fixed block 15, when the user presses the fixed plate 5, the spring 18 promotes the clamping block 17 to tightly clamp the condenser pipe 4 through the elastic action, preventing the battery pack from shaking during use, and enhancing the stability and safety.

[0046] Those skilled in the art should understand that those skilled in the art can realize the change example in combination with the prior art and the above-mentioned embodiments, which will not be described here. Such change examples do not affect the essential content of the utility model, which will not be described here.

[0047] The preferred embodiments of the present application are described above. It should be understood that the present application is not limited to the specific embodiments described above, wherein the devices and structures not described in detail should be understood as being implemented in the ordinary way in the art; any person skilled in the art, without departing from the scope of the technical scheme of the present application, can make many possible changes and modifications to the technical scheme of the present application by using the disclosed methods and technical contents, or modify equivalent embodiments, which does not affect the essential content of the present application. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application, without departing from the content of the technical scheme of the present application, still belongs to the scope of protection of the technical scheme of the present application.

Claims

1. A liquid cooling structure for an energy storage battery pack, characterized by, Include: The outer protective shell and the electric core module, liquid pump and liquid tank located in the outer protective shell; The top and bottom of the electric core module are fixedly connected with first heat-conducting sheets, and the inner cavity of each first heat-conducting sheet is provided with a condenser pipe. The side opposite to each first heat-conducting sheet is fixedly connected with a fixed plate. The liquid tank is fixedly arranged at the bottom of the lower fixed plate. The liquid inlet end of the liquid pump is in communication with the liquid tank. The liquid outlet end of the liquid pump is in communication with the liquid inlet end of two condenser pipes respectively. The liquid outlet ends of the two condenser pipes are in communication with the liquid tank. Each condenser pipe is provided with at least two liquid inlet and outlet pipes.

2. The liquid cooling structure for an energy storage battery pack according to claim 1, wherein The edges of the electric core module, first heat-conducting sheets and fixed plates are aligned up and down. One side of the liquid tank protrudes outward from the fixed plate. The liquid pump is arranged at the top of the protruding side of the liquid tank.

3. The liquid cooling structure for an energy storage battery pack according to claim 2, wherein One side of the electric core module, two first heat-conducting sheets and two fixed plates is fixedly connected with a fixed baffle. The bottom of the fixed baffle is fixed to the top of the protruding side of the liquid tank. The liquid pump is arranged on the outer side of the fixed baffle. The liquid outlet end of the liquid pump is in communication with the liquid inlet end of two condenser pipes through a liquid inlet pipe. The liquid inlet end of the liquid inlet pipe is in communication with the liquid outlet end of the liquid pump through the fixed baffle.

4. The liquid cooling structure for an energy storage battery pack according to claim 3, wherein Both of the condenser pipes are provided with two liquid inlet ends and one liquid outlet end. The two liquid inlet ends of each condenser pipe are located on both sides of the liquid outlet end of the condenser pipe. The liquid inlet ends of the two liquid inlet pipes are connected by a liquid inlet pipe. The two liquid inlet pipes are connected by a liquid inlet communication pipe. The liquid inlet end of the liquid inlet pipe arranged near the liquid pump is in communication with the liquid outlet end of the liquid pump through the fixed baffle. The liquid outlet ends of the two condenser pipes are connected by a liquid outlet pipe. The liquid outlet end of the liquid outlet pipe is in communication with the liquid tank through the fixed baffle.

5. The liquid cooling structure for an energy storage battery pack according to claim 4, wherein The liquid outlet end of each liquid inlet pipe is in communication with the liquid inlet end of two condenser pipes through a flange. The two liquid inlet ends of the liquid outlet pipe are connected to the liquid outlet end of two condenser pipes through a flange.

6. The liquid cooling structure for an energy storage battery pack according to claim 3, wherein The outer side of the fixed baffle is connected with a first fixed block near the liquid inlet pipe. The inner cavity of the first fixed block is fixedly connected with a first motor. The output end of the first motor is fixedly connected with an electric control valve. The electric control valve is arranged on the liquid inlet pipe.

7. The liquid cooling structure for an energy storage battery pack according to claim 6, wherein The electric control valve is an electric butterfly valve.

8. The liquid cooling structure for an energy storage battery pack according to claim 6, wherein A plurality of heat dissipation holes are formed in the surface of the first fixed block.

9. The liquid cooling structure for an energy storage battery pack according to claim 1, wherein A plurality of clamping mechanisms for clamping the condenser pipe are arranged on the surface of the fixed plate. The clamping mechanism includes a second fixed block, a fixed rod and a clamping block. The second fixed block is connected to the fixed plate. The inner cavity of the second fixed block is fixedly connected with a fixed rod. The clamping block is rotatably connected to the fixed rod. The two sides of the bottom of the clamping block are fixedly connected with springs. The other end of the spring is fixedly connected to the top of the second fixed block. The condenser pipe is arranged in the inner cavity of the clamping block.

10. The liquid cooling structure for an energy storage battery pack according to claim 1, wherein The bottom of the liquid tank is fixedly connected with two second heat-conducting sheets, and the surface of each of the two second heat-conducting sheets is fixedly connected with a fan. The bottom of the liquid tank is fixedly connected with a second motor, and the output end of the second motor is electrically connected with the fan.

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